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People who were overweight at 26 or 36 years old had a twofold higher risk of developing chronic kidney disease by the time they were seniors than those who were never overweight or did not become overweight until they were 60 to 64 years old, according to a study published in the Journal of the American Society of Nephrology. People with a higher waist-to-hip ratio during middle age were also more likely to develop chronic kidney disease at age 60 to 64.

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People with chronic kidney disease may have triple the risk of kidney failure if they eat a high-acid diet compared with those who had a low-acid diet, researchers reported in the Journal of the American Society of Nephrology.

Individuals with chronic kidney disease were more likely to develop treatment-resistant hypertension than those with functioning kidneys, according to a study in the Clinical Journal of the American Society of Nephrology. Male and black patients had a greater risk of resistant hypertension, along with those with bigger waist size, diabetes, a history of myocardial infarction or stroke, worsening renal function, and statin use.

A study in the Netherlands found that people with higher waist-to-hip ratios had higher blood pressure in their kidneys, which could cause kidney damage over time, even if they were not overweight. The risk of elevated kidney blood pressure was higher among those who both are overweight and have a higher waist-to-hip ratio. The study was published online in the Journal of the American Society of Nephrology.

A study of middle-age Australians estimated that those who had a sedentary lifestyle could see a threefold improvement in insulin sensitivity and reduce their diabetes risk by walking 10,000 steps each day, compared with those who walked just 3,000 steps. The researchers at Murdoch Children's Research Institute wrote in the British Medical Journal that higher daily step counts also were associated with lower body mass indexes and waist-to-hip ratios.

Data from a study that followed some 37,000 men for 16 years showed obese adults had a 29% higher risk of periodontal disease than those at normal weight. The researchers also said men with a waist of 40 inches or more had a 19% higher risk of gum disease. A second study by the team found men and women with an elevated waist-to-hip ratio were almost six more likely to have gum disease than those without an elevated waist-to-hip ratio.